friend, check the last page, that's usually what official english tl puts for jp manga. the kr bl is a bit different bc most of them got scanlations first before the officials were uploaded, and even if there's no scanlations, the habit of tagging it as official just carried over. (also the other dead blue site required it to be tagged if it's official.)
i could be wrong but no scanlator would take the effort to translate and place a copyright page.

i didn't know this was finally complete, i remember reading vol1 way way back but... why do the kids call saku by first name in the last chap?? saku was referring to himself as daddy to aoi before, so it's so weird. really threw me off, especially since the prev. chapters wanted to do something about the acceptance of mixed race families, but the tl/localization said "yeah the kids call their omega dad by first name"